Granville gear box upgrade

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Mar 2, 2014
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Hi Guys
Does somebody remember the Granville kit of gears for the Norton box ? If I m right was a kit of 4 pinions to change all the gearing , a cheap alternative to a close ratio GB
 
Remember the Granville motors outrigger clutch heavy duty grasstrack. Also at an auto jumble a crankshaft ex works? welded up pork chop steel flywheels?
Need to ask my mate Rob he was intrigued.
 
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